Surface plasmons
Surface plasmons
Surface plasmons
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Plasmon-Polaritons<br />
Plasma oscillation = density fluctuation of free electrons<br />
+ + +<br />
- - -<br />
k<br />
+ - +<br />
Plasmons in the bulk oscillate at ω p determined by<br />
the free electron density and effective mass<br />
2<br />
Ne<br />
mε<br />
Plasmons confined to surfaces that can interact<br />
with light to form propagating “surface plasmon<br />
polaritons (SPP)”<br />
Confinement effects result in resonant SPP modes<br />
in nanoparticles<br />
2<br />
drude 1 Ne<br />
ω particle<br />
3 mε<br />
=<br />
ω<br />
drude<br />
p<br />
=<br />
0<br />
0
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